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      1 /*	$NetBSD: fast.c,v 1.2 2017/01/28 21:31:49 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2011 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include "krb5_locl.h"
     37 
     38 
     39 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
     40 _krb5_fast_cf2(krb5_context context,
     41 	       krb5_keyblock *key1,
     42 	       const char *pepper1,
     43 	       krb5_keyblock *key2,
     44 	       const char *pepper2,
     45 	       krb5_keyblock *armorkey,
     46 	       krb5_crypto *armor_crypto)
     47 {
     48     krb5_crypto crypto1, crypto2;
     49     krb5_data pa1, pa2;
     50     krb5_error_code ret;
     51 
     52     ret = krb5_crypto_init(context, key1, 0, &crypto1);
     53     if (ret)
     54 	return ret;
     55 
     56     ret = krb5_crypto_init(context, key2, 0, &crypto2);
     57     if (ret) {
     58 	krb5_crypto_destroy(context, crypto1);
     59 	return ret;
     60     }
     61 
     62     pa1.data = rk_UNCONST(pepper1);
     63     pa1.length = strlen(pepper1);
     64     pa2.data = rk_UNCONST(pepper2);
     65     pa2.length = strlen(pepper2);
     66 
     67     ret = krb5_crypto_fx_cf2(context, crypto1, crypto2, &pa1, &pa2,
     68 			     key1->keytype, armorkey);
     69     krb5_crypto_destroy(context, crypto1);
     70     krb5_crypto_destroy(context, crypto2);
     71     if (ret)
     72 	return ret;
     73 
     74     if (armor_crypto) {
     75 	ret = krb5_crypto_init(context, armorkey, 0, armor_crypto);
     76 	if (ret)
     77 	    krb5_free_keyblock_contents(context, armorkey);
     78     }
     79 
     80     return ret;
     81 }
     82 
     83 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
     84 _krb5_fast_armor_key(krb5_context context,
     85 		     krb5_keyblock *subkey,
     86 		     krb5_keyblock *sessionkey,
     87 		     krb5_keyblock *armorkey,
     88 		     krb5_crypto *armor_crypto)
     89 {
     90     return _krb5_fast_cf2(context,
     91 			  subkey,
     92 			  "subkeyarmor",
     93 			  sessionkey,
     94 			  "ticketarmor",
     95 			  armorkey,
     96 			  armor_crypto);
     97 }
     98